The UK’s soft drinks industry levy, also known as the sugar tax, was set out to fix one thing — too much sugar in what people drink — but somewhere along the way, it opened up a whole different debate. Since its introduction, drinks have become less sugary, yet just as sweet, thanks to artificial substitutes. Now, more people are starting to question whether this trade-off is actually better for their health.
The tax was introduced in April 2018 to push companies into cutting sugar content and help reduce obesity and related diseases. The tax didn’t hit consumers directly. Instead, it put the pressure on manufacturers, charging them based on the sugar content in their drinks. And you can bet they changed their recipes, and fast. Studies published in journals like The BMJ and reports from Public Health England show sugar levels in soft drinks dropped significantly — by around 30% in some cases — before and after the policy came into force. On paper, that looks like a major win, and overall, sugar consumption from beverages has declined.
But companies didn’t just make drinks less sweet — they replaced sugar with artificial sweeteners like aspartame and sucralose to keep the same taste. So now, there are a lot more artificial sweeteners in both “diet” and regular sodas. People have had mixed feelings about it. Some are happy about the lower sugar content, but others feel uneasy about consuming more artificial ingredients.
The health side of things is where it gets complicated, because while sugar is clearly linked to obesity, diabetes, and tooth decay, artificial sweeteners are murkier territory. Research is still ongoing, the long-term picture isn’t fully clear, and depending on which study you read, the conclusions can look pretty different.
The government’s current direction suggests they’re doubling down rather than reconsidering. From January 2028, the levy will extend to sugary milk-based drinks and plant-based alternatives, plugging gaps in the existing framework and pushing more of the market toward reformulation.
It’s not just the UK, either. Countries like Mexico, France, and even parts of the US have brought in similar sugar taxes. The results have been a bit of a mixed bag, but on the whole, they do seem to lead to people buying less sugar. Still, critics argue swapping one iffy ingredient for another doesn’t put public health first. It often feels like companies are just trying to protect their profits by keeping drinks just as sweet, no matter what, instead of actually making them healthier.
The more uncomfortable fix would involve actually changing what people expect drinks to taste like — gradually reducing sweetness across the board rather than substituting for it. Clearer labeling would give people a better chance of making informed choices. None of that is as simple as adjusting a levy, but getting people off the sweetness treadmill entirely — whether it runs on sugar or something else — is probably the only version of this story that ends well.
